Question 535356
13, and identity
First, you would multiply 6 and 4d by 2
12-8d=25-9d
Then you would subtract both sides by 12
-8d=13-9d
Then you would add both sides by 9d
Because -8+9=1, it would be 1d, which is the same as d
So, d=13
and it is an identity because the statement is true
(A no solution means the statement isn't true, like 0=2)